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Duel.com

Duel.com

certified

ACTIVE: Jun 10, 2026

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  • Audit reference ID

    PF-2026-DUEL

  • Website

    Duel.com

  • Games Audited

    10 Originals

  • Auditor

    ProvablyFair.org

  • Certification date

    June 8, 2026

    Next schedule review

    June 8, 2027

  • About Audit

    We audited Duel.com across 10 games spanning three RNG architectures (client+server seed, drand-anchored beacons, and HMAC-seeded PCG32). All games passed the ProvablyFair.org Audit Framework v1.0. 4 input-validation flags disclosed, none affecting outcome integrity.

  • Verify the audit itself

    Every test, dataset, and result is open source - anyone can re-run the entire audit end to end

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Final Audit Result

Certified using our 5-Point Fairness
Framework

This section outlines the evaluation of the casino's provably fair system across our 5-point audit framework. Each item is a core verification area, independently tested using standardized methodology.

Audit ItemStatusFindings
1. Seed, Nonce & Determinism
Pass
Commit-reveal verified across all 10 games. Every server seed hash published before bet acceptance matches the revealed seed post-round (SHA-256 parity: 53,475/53,475). No seed mutation, no shared seed pools, nonce continuity confirmed. Crash and Castle Roulette additionally bind drand beacon timing.
2. RNG & Entropy Model
Pass
HMAC-SHA256 implementation verified against published verifier code for all 10 games. Rejection sampling confirmed unbiased across finite output spaces. External entropy sources (drand quicknet for Crash and Castle Roulette) independently verified against public chain.
3. Live Game vs Verifier Parity
Pass
53,475 live bets recomputed across 10 games from the same cryptographic inputs the casino used. 100% outcome parity. All payouts verified against published formulas, with intermediate states (card draws, reel cells) reproduced exactly, not just final win amounts.
4. Game Logic & RTP Validation
Pass
253M+ simulated rounds across 10 games. Empirical RTP converges to theoretical within expected tolerance for every configuration, including all bet brackets for games with bracket-scaling edges. Chi-squared with Bonferroni correction and Fisher's multi-stream tests pass α=0.01. Serial independence confirmed.
5. Fairness Integrity Testing
Pass
151 fairness-integrity test cases across 10 games covering nonce injection, seed tampering, payout manipulation, authorization boundaries, and commitment timing attacks. No vector for unfair advantage identified. 4 input-validation flags disclosed — none affect outcome, RTP, or payout integrity.

For each item, we document the compliance status, technical findings, and the method of verification used to validate the implementation.

53,475Live Bets Verified
253MSimulated Rounds
151Game Integrity Checks
10Games Certified

Game Testing

Audited Games Overview

This section lists the games reviewed during the audit, including checks for RNG integrity, RTP accuracy, and compliance with provably fair standards.

Game nameStatusProven RTPObserved RTPLive BetsSim Rounds
PlinkoPlinko
Pass
99.9%99.917%8,100
27MView Audit
DiceDice
Pass
99.9%99.922%6,700
98MView Audit
MinesMines
Pass
99.9%99.904%7,050
24MView Audit
KenoKeno
Pass
99.9%99.970%5,100
40MView Audit
BeefBeef
Pass
99.2%99.147%6,450
4MView Audit
CrashCrash
Pass
99.9%99.872%1,100
5MView Audit
Castle RouletteCastle Roulette
Pass
100%100.007%1,350
5MView Audit
Black JackBlack Jack
Pass
99.43%99.467%6,000
10MView Audit
Video PokerVideo Poker
Pass
99.9%—5,400
10MView Audit
Groomers VanGroomers Van
Pass
99.972%100.06%6,225
30MView Audit

Results feel wrong? Learn why or report a verification issue

Player help

Behind The Proof

What Makes This Audit Different

Not a badge. Not a claim. A full breakdown of how the live system was tested and verified — with receipts.

Live, Open-Source Report

Full audit as a live document — updated when games change. Every finding links to reproducible evidence.

Real Bets, Not Just Simulations

Real production bets captured and independently recomputed. We prove the live system matches its claimed logic.

Reproducible by Anyone

Every dataset, script, and simulation on a public repo. Clone it and verify yourself.

Integrity Tested

Fairness guarantees tested under adversarial conditions — seed commitment, nonce integrity, determinism, and payout integrity.

Provably Fair Calculator

Verify Any Bet Yourself

This tool independently recomputes game results using the same inputs used by the casino. Powered by open-source code — don't trust us, verify it yourself.

Game Verifier

Enter the round data. The result is calculated from the code we audited - compare it with what the casino showed you.

Want to verify 10,000 bets at once? Open full verifier →
Need help? See how it works

Full Transparency

Dig Deeper and Inspect Everything

Access the full report, raw datasets, and open-source logic used to independently recompute real production bets.

View Full Audit ReportSource Code & DatasetsPlayer Help